🇺🇸 United States ZIP Code

STANDARD

93420

Arroyo Grande

ZIP Code 93420 is a standard zip code serving Arroyo Grande, Arroyo Grande, California (CA), in San Luis Obispo County, United States. It has an estimated population of 28,413 with a median household income of $67,035. The area falls within the America/Los_Angeles timezone.

Median Household Income vs. National Average

Location

Country: 🇺🇸 United States
State / Province: California (CA)
County: San Luis Obispo
City: Arroyo Grande
Timezone: America/Los_Angeles

Coordinates

Latitude: 35.166100
Longitude: -120.465100

Geographic Details

Land Area: 187.36 mi²
Water Area: 1.14 mi²
Population Density: 152.0 people per mi² (55th percentile)
Bounding Box: 35.312017°N, 35.028907°S, -120.240028°E, -120.629586°W

With 28,413 residents spread across 187.36 square miles, this area has a population density of 152.0 people per square mile.

Demographics

28,413

Population

85th percentile

$67,035

Median Income

80th percentile

$531,700

Median Home Value

95th percentile

187.36 mi²

Land Area

The median household income in 93420 is $67,035, and the median home value is $531,700. This places the area in the top 25% nationally for household income.

Housing

12,444

Total Units

11,428

Occupied Units

91.8%

Occupancy Rate

Nearby ZIP Codes

Other zip codes in Arroyo Grande, CA.

93421

Arroyo Grande

Similar ZIP Codes in California

ZIP codes with similar median household income in California.

95818

Sacramento

$57,500

95252

Valley Springs

$65,395

90502

Torrance

$63,721

95366

Ripon

$71,560

95693

Wilton

$76,392

95465

Occidental

$76,439

90242

Downey

$58,217

90717

Lomita

$58,320

Frequently Asked Questions

What information is available for each ZIP code?

Each ZIP code page shows city, state, county, geographic coordinates, timezone, population, median household income, median home value, housing units, land area, population density, commute time, educational attainment, area codes, and ZIP code type (Standard, PO Box, or Unique).

What are the different types of ZIP codes?

There are three types of ZIP codes: Standard (residential and commercial delivery areas), PO Box (assigned to post office box sections), and Unique (assigned to a single high-volume address like a government agency or large company). Standard ZIP codes are the most common.

How often is ZIP code data updated?

ZIP code assignments are updated quarterly by the USPS. Demographic data comes from the US Census Bureau's American Community Survey (ACS), which releases new 5-year estimates annually. ZipFYI updates its data to reflect the latest available information.

What is population density and why does it matter?

Population density measures the number of people per square mile in a ZIP code area. It helps identify urban vs. rural areas, affects real estate values, impacts service availability, and is used in market analysis. Dense urban ZIP codes may have 50,000+ people per square mile.

How are ZIP code boundaries determined?

ZIP code boundaries are determined by the USPS based on mail delivery routes, not political or geographic boundaries. They follow carrier routes and may cross city, county, or even state lines. Boundaries can change when the USPS reorganizes delivery operations.

What does median household income tell me about a ZIP code?

Median household income is the middle value when all household incomes in a ZIP code are sorted. Half of households earn more and half earn less. It is a better indicator of typical earnings than average income, which can be skewed by very high or very low outliers.